Asked how she keeps in shape, she said: "If I'm honest, it's lots of working out, which is a commitment and boring... and then sexercise."

On Stern, she added: "I did his radio show about 18 years ago and he was very feisty on the radio and as soon as the radio switched off, he was like a lovable teddy bear.

"I don't think he wants anybody to know that, but yes, he is a softy pants! He does have an image where he can be a little bit feisty and that's what people expect and like, but he's actually a sweetheart.